Expansion-bolt.



elevation in the'said o of the drawings, an ordinary To ll'iuwm 'it 'may concern:

Va citizen of State o -ing 1s a specification.

whereby the a' UNITED sTATE smiriinr osnicii T0 JOHN AnLANCASTER AND WALTER W.

WILKEN, OF WETUMPKA. ALABAMA..

'Expansion-Bona.

spemcanon of Lenersmtm. PatentedwMar. 22 1919.

Application filed June 14, 1909. Serial No. 502,084.

Be it known that I, WILLIAM A. BRYANT, the United States, residing at ka, in the county of Elmore and Alabama, have 4invented a new and useful Expansion-Bolt, ofwhich the follo etum is the object of the present invention to provide an article forapplication to wood screws for holding such openings which wouldj large to receive andyretan stone or plastic inaterials. A

Broadly seaking, .thedevice embodying the present invention isconstrutegl 'ofa' single strand of wire" which is bent-to form` convoluted spaced port'ons the coii'volutions of whichengage in the threads of the screw -upon which the device is dis osed, the said spaced portions being forme further, with. b portions which project beyond-the planes of' the convolntions whereby when the spacedportions are separated to agreateroigless degree, the said projecting portions will bite into the inaterialfinto which the screw is being secured.

ln the accoinpnnying drawings, Fi uie l is a. View in side elevation of an or inaiy wood screw showing the device embodying the present invention applied thereto. Fig.. 2 is a plan view' of the device removed from the screw. Fig. 3 is a view in elevation of ja piece of material formed with an opening into which the screw shown in Fig. 1 is to )e fastened, the device being shownin end peningg'and Fi 4 is t e dee /screw otherwise .bek too them,in brick,

a view similar to F ig. 3 but showin vice expanded by the insertion of t between its spacedportions. I

As above stated, there is/sh-o'wn, n-QEg. 1 v

wood screw, indicated by the numeral 5 and having formedwthereon the usual threads -6. TheY device embodying the present invention and adapted for disposal upon the screw 5 screw muy be secured in an openin of a diameter greater` than the major diameter of the screw, is formed from a single strand of wire which is bent intermediate 'otits ends to f orm a siibstantially annular loo t or eye indicated by-the nu` moral 7. T is eye 7 is open as is clearly ,shown in Figs. 3 and 4 of the drawings, and the wire at cach terminal ofthe loop 4is volutio'ns'-V of `oppcisitely inclined." The convolutions 10 aremore nearly vertical than are the llitions -9 and both the convolutions 9 and t 'of each of the s extend outwar ly y the numeral bent' connecting ltions have the portions 8 and all oft veach from the connected ends of the their free ends. as arealso the an ularly directed coi'ineoting portions l1 convoli'itions whereby a bodily tapering dcvice is to cause it other words members thereof. The intermediate outwardly bowed portions of the convolutions rof both spaced members ofthe device will 'seat between the threads of the screw 5 and owing to the fact that this screw is'ta he said spaced portions will be gra lary .directed connecting convolutions will hich th 4 clearly shown in Fig. 4 of the drawings. It will be observed that-tbe aigularly directed connecting' crtio ject beyon portions of the convolutions and that consequently the screw 5 may be secured in an o e'nii of a. diameter much greater than tiat o thescrew observed from an bent to-extend laterally in diver ing lines as indicated by portions 8, the mately parallel convolutions of tain ones are the others by th .tions 9 of each 'tions or members thus formed are as are also. the convolutions'lO a `screws 1n .place m th the numeral 8.

wire is bent to form ap roxiwhici cerindicated by the numeral 9 and e numeral 10.. The convoluofthe convoluted spaced porarallel all of e convolutions are inclined and the conthe two spaced members are e convolutions 10 are bowed outwardly to slight'dv ree asis clearly shown in Figs. and'4 o the drawings, the convolutions aced members beingbent to portions, 1l`of the convoluular extent as the. ie convolutions of successively `members to member are shortened provided. In using the device just described it is 'placed, major end .first, 1n. the opening in which the screw 5 is to be secured and the screw is then rotated in the usual manner to thread into the device oibin` into position between the spaced ered, ually anded or separated -whereupon the :ingu-- ortions of thel bite into t e screw is to b e secured; this is ns of'the convolutionsdpro- Athe planeof the interme iatc itself.' It lwill further be inspection of the draw of t ie said' e material into' eyond the at an a'ngle as indicated l1. The lower outwardly 'in'gs andinore particularly Fig. 2 thereof Y that the substantially annular loop. 7, conthan are the convolutions 9, these convoluf tions-10 will lie substantially7 diagonally across the spaces between the threads which spaces they occupy whereas the convolutions 9 have the saine line of extension as `have the threads and `.that therefore While the convolutions 9 s erveto guide the screw to position between the spaced members of the device, the convolutions 10 efectually hold the screw against play which would otherwise occur if the Wire of which the device is formed' was Aof small diameter and all of -the convolutions of the two spaced membeirs extent as t 1e' shouldhave the same line o threads in which they engage.

What is claimed is z- 1. A device of the class described compris ing spaced, connected members having relatively. angularly displaced thread engaging portions, the connection permitting of spreading apart of said members.

2. A device ofthe class described comprisingspaced, connected membeis having relatively angularly displaced thread engaging portlons and portions projecting beyond thel planes of said thread engaging portions, the connection permitting of spreading apart of said members;

3. A device of the class described com-prising tapering spaced, connected members having relatively angularly displaced thread I engaging portions, the comiectioh perl ting of spreading apart of said member: A 4. A devicef the class described comp ing tapering spaced, connected meml` having relatively angularly displaced thr engaging-portions and portions project: beyond the planes of the first mentioi portions, the connection V permittingspreading apart of said members.

5. A device of the'classdescribed compl ing tapering spaced, connected memb having relatively angularly displaced thre engaging portions and portions projecti beyond the planes of the first mentioned p( tions, said projecting portions being c creased in length in orderin the directi of taper of the said members, the connecti permitting .of spreading apart of said me] bers. 6. A device of the class described compri ing tapering spaced members connected` their major ends'and having relatively a: gularly displaced thread engaging portioi and portions projecting beyond the plan of the thread engaging portions and `d creased in length successively in order i the direction of taper of the said member 7. A device of the class described compri ing spaced members having relatively a1 -gularly disposed thread engaging convoll tions, said convolutions decreasing in lengt toward corresponding ends of the member In testimo11y that I claim the foregoin as my own, Igiave heretoaliixed my signa ture in'the presence of tivo Witnesses.

VWILLIAM A.. BRYANT.

Witnesses:

F. Loro Tarn,

M. l). STILL. 

